When the ground water cooperates with me, I can chill my 5.5-6 gallons of boiling hot wort to ~65F in about 8 minutes with my plate chiller. This is going directly into my fermenter too, so you can eliminate the time it takes to rack/transfer your chilled wort to primary from the equation. I've only had one chill time take longer than expected. That was with the last batch, where the ground water was still elevated due to the high temperatures we had been going through. I expect the chilling time to be back to my normal range for the next batch (probably end of the month).
You can chill to the same level, provided your chill water is the right temperature range, pretty easily/quickly. It's just using a plate chiller (or CFC for that matter) requires far less work in order to hit those temperatures. When I was using an IC, I had to move it around within the kettle in order to get it to chill even close to how quickly the plate chiller works. That meant using something to hold the chiller with, since one side WILL be very hot for at least the initial cool-down period (until the wort hits a temperature you can hold with bare hands).
As for the previous comment about the plate chillers being difficult to clean. Not in my experience. Maybe it's because the one from Rebel comes with the back-flush hose. Or maybe it's because I run that through both directions before disconnecting. Or maybe because I use QD's on both ends of the wort side. I also mix up some PBW solution in my brew/boil kettle post brew-day to clean items that need it. I then fill the plate chiller with some of the solution and let it sit. I then drain it out and rinse REALLY well before putting it away for next time.
IF possible, see if there are any brewers in your area with the different types of chillers. See what they go through to use said chillers to cool down a batch of brew.
Something else to keep in mind... The 3/8" copper tubing (flexible) that Lowes has has different wall thicknesses between the 25' and 50' packages. Not sure why, but if you look at the ends of both, the 25' will be thinner than the 50'. The 25' tubing package is fairly easy to bend by hand. Where the 50' package is a biotch to bend even when you use a keg as your mold. IF you can get the thinner wall stuff (matches the 25' wall thickness) then you'll be ok. Otherwise, I'd avoid it.
Also, when you eventually get a brew stand (we all want one, right?) you'll be able to mount the plate chiller to the stand. You can't do that with the IC. So you'll always have that extra set of items to use with the IC.